Summarize this content to 2000 words in 6 paragraphs Severe weather is set to hit opposite ends of the country this week, with a powerful low pressure system — followed by an atmospheric river — set to bring damaging winds, heavy rain and snow to the Pacific Northwest, while storms and possible flooding are headed for the Gulf Coast.The National Weather Service said in a 3 a.m. ET update that a “rapidly strengthening and extremely powerful” weather system could bring winds of 70 mph across northern California and parts of Washington and Oregon from Tuesday.”These winds are likely to produce numerous power outages and tree damage in the most impact regions,” the weather service said.Flood watches were issued in the northern and central Sacramento Valley, Shasta County and western Colusa County from Tuesday morning through to Saturday.Parts of California reached freezing temperatures Monday, with 25 degrees Fahrenheit recorded in Paso Robles.An atmospheric river — a flowing narrow corridor of moisture that can bring severe weather — was set to hit California’s Redwood Coast and northern mountain ranges on Wednesday, bringing the threat of 5 to more than 10 inches of rain, floods and mudslides, with the threat peaking on Thursday. Satellite images show a weather system approaching the Pacific Northwest on Tuesday morning.NOAAThe NWS urged people in affected areas to follow local news and alerts and not to travel through hazardous conditions.”This is going to be a big one,” NBC meteorologist Angie Lassman told “Early TODAY” Tuesday morning.Further south, the eastern and central Gulf Coast is due to receive heavy rain and possible flash floods, with eastern Louisiana to the western Florida Panhandle the area most at risk, the NWS said.Elsewhere, a deep low pressure system will bring moderate to heavy rain across the Plains region, with a marginal risk of severe thunderstorms.
